DSP is the abbreviation of digital signal processing. Digital signal processing is a method to process and analyze signals through digital technology. In electronic engineering, DSP usually involves filtering, transforming, encoding and decoding digital signals to achieve specific signal processing tasks. Digital signal processing is widely used in many fields, including audio processing, image processing, communication system, radar system and so on.

DSP usually uses a digital signal processor (DSP chip) to execute various signal processing algorithms. These algorithms can be used to improve signal quality, extract specific features, compress data and so on. In communication systems, DSP is used to decode and encode audio signals, modulate and demodulate modem signals, and perform other tasks related to signal processing.